ack/mach/pmds/libsys/sbrk.s

56 lines
683 B
ArmAsm
Raw Normal View History

1985-02-07 15:58:40 +00:00
.define _brk
.define _sbrk
.sect .text
.sect .rom
.sect .data
.sect .bss
.sect .text
1985-02-07 15:58:40 +00:00
.extern _brk
.sect .text
1985-02-07 15:58:40 +00:00
_brk:
tst.b -40(sp)
link a6,#-0
move.l 8(a6),-(sp)
jsr __Sbrk
add.l #4,sp
unlk a6
rts
.extern _sbrk
_sbrk:
tst.b -40(sp)
link a6,#-0
move.w 8(a6), d2
ext.l d2
move.l d2,-(sp)
jsr __Ssbrk
add.l #4,sp
unlk a6
rts
__Ssbrk: tst.b -8(sp)
move.l 4(sp),d0
beq 1f
add.l nd,d0
move.l d0,-(sp)
clr.l -(sp)
trap #0
.data2 0x11
1985-02-07 15:58:40 +00:00
add.l #8,sp
bcc 1f
jmp cerror
1:
move.l nd,d0
move.l 4(sp),d1
add.l d1,nd
rts
__Sbrk: trap #0
.data2 0x11
1985-02-07 15:58:40 +00:00
bcc 1f
jmp cerror
1:
move.l 4(sp),nd
clr.l d0
rts
.sect .data
nd: .data4 endbss
.sect .text